DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126 Issue 4
June 1999
Maintenance Object Repair Procedures
9-670DS1 CONV-BD
9
Upgrading TN574 DS1 CONV Circuit Packs in a
fiber-link to TN1654s—Duplicated PNC
!WARNING:
Do not power down a Switch Node carrier to replace a circuit pack.
!WARNING:
In duplicated PNC configurations, one DS1 CONV complex in the fib er-link
serves as the active and the sec ond DS1 CONV complex serves as the
standby. Each DS1 Converter Complex consists of two TN574 boards or
two TN1654 boards. A TN574 cannot be c ombined with a TN1654 in the
same DS1 CONV Complex. It is also required that all four DS1 CONV
boards and interconn ecting facilities that ser ve an EPN be of the same
type. Note, however, that TN574 and TN1654 boards c an coexist within the
same system, they just cannot be in the s ame fiber-link.
!WARNING:
The two DS1 CONV boards, TN1654 and TN574, use unique “Y” cables that
are incompatible with each other.
!WARNING:
A TN573B or later suffix board must be used when connecting a SNI board
to a TN1654 DS1 Converter board.
Wait 5 minutes for SNI-BD, FIBER-LK
AND DS1C-BD alarms to clear, or enter
clear firmware-counters a-pnc
Table 9-260. Upgrading TN574 DS1 CONV Circuit Packs in a fiber-link to
TN1654s—Duplicated PNC
Steps Comments
Enter status pnc Verify that the A-PNC is active. If the
B-PNC is active, enter the reset pnc
interchange command to cause the
A-PNC to go active.
Continued on next page
Steps Comments